利用变采样率技术改进机载雷达的跟踪性能

Improving of the Tracing Performance of Airborne Radar by Using Changing Sample Ratio Processing Technology

机载雷达跟踪目标丢失现象的重要因素之一是由于雷达载机与目标之间的相对运动 ,在回波信号中产生线性调频项 ,线性调频项对多普勒频率和距离门估计产生了积累误差 ,最终导致跟踪目标丢失。提出了应用变采样率技术估计线性调频项参数来减小距离跟踪的误差 ,提高雷达的跟踪目标性能。同时还进行了具体的理论分析和计算机仿真 ,结果表明该技术是有效的。

In this paper, it is considered that one of the key factors is LFM term in echo signal by analysing the target traced airborne radar. The LFM term is resulted in motion between the airborne and target traced, which produces the accumulative error of the Doppler frequency and cell estimated. The parameter of LFM term estimated by the changing sample ratio processing technology to improve the performance of tracing distance is presented. The theoretical analysis and simulation prove that it is efftective.\;